JPH06101955A - Refrigerating unit for container - Google Patents

Abstract

PURPOSE:To securely prevent closing a cover from being for go then by a method wherein there is provided means for sensing a forgetful closing of the cover for opening or closing a front opening of a main body of a box having a control equipment stored in it and when an alarm means is operated when the forgetful closing of the cover is detected. CONSTITUTION:A control box of a refrigerating unit for a container stores control units such as a controller, a recorder and a relay and the like, and then its front opening is opened or closed by a cover 51. This cover 51 is fastened in such a manner that its one side edge is pivotally supported by a hinge and a wing bolt 54 arranged at a bracket 53 projected at the other side edge is threadably fitted into a nut 56 on a fastening piece 55 projected at the main body 50 of the box. In this case, there is provided a limit switch 60 which is turned OFF when the cover 51 is closed at the fastening piece 55. With such an arrangement, in the case that the cover 51 is not closed, the limit switch 60 is turned ON to energize a relay 61 and its contact point 62 is closed, thereby an alarm means 63 such as buzzer is operated.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a refrigerating unit for a container.

[0002]

2. Description of the Related Art A schematic structure of a conventional container refrigeration unit is shown in FIG. 3, where (A) is a front view and (B) is (B) of (A).
FIG. 6C is a vertical cross-sectional view taken along the arrow B, and FIG. 9C is a cross-sectional view taken along the arrow C-C in FIG. The refrigeration unit 100 is assembled to one end wall 2 of the container 1, and cargo is accommodated in the container 1 from a door (not shown) provided on the other end wall. By operating the refrigeration unit 100, the container 1 is mounted on a ship, truck, rail vehicle, etc. while maintaining the inside air temperature in the container 1 at a temperature arbitrarily set within the range of -25 ° C to + 25 ° C. To transport.

During operation of the refrigerating unit 100, the gas refrigerant discharged from the compressor 3 enters the water cooling condenser 5 or the air cooling condenser 4 and is condensed and liquefied there. The liquid refrigerant enters the expansion valve 9 via the dryer 7 and the strainer 8 and is throttled there to undergo adiabatic expansion to become a gas-liquid two-phase refrigerant. This refrigerant enters the evaporator 10, where it evaporates and vaporizes by cooling the air in the refrigerator, and then the accumulator.
After returning to the compressor 3, the compressor 3 is returned to.

A process in which the air inside the container 1 enters the evaporator section 15 from the suction port 14 as shown by the solid line arrow, is urged by the evaporator fan 12 driven by the motor 11, and flows through the evaporator 10. After being cooled by, the air returns to the inside of the container 1 through the air passage 16 and the blowing chamber 18, and is blown into the inside of the container through the gap between the T-shaped ventilation rails 43 laid on the bottom surface thereof.

When the air-cooled condenser 4 is used, the motor
The condenser fan 6 is driven by 17. Then, as shown by the broken line arrow, the outside air is sucked into the condenser section 42 and is heated by exchanging heat with the gas refrigerant in the process of passing through the air-cooled condenser 4, and then is urged by the condenser fan 6 to be discharged into the atmosphere. Released inside.

When the water-cooled condenser 5 is used, a water supply valve and a drain pipe (not shown) are connected to the inlet fitting 19 and the outlet fitting 20 to open the water control valve 21. Then, the condenser fan 6 is stopped. Then, the cooling water supplied from the water supply pipe enters the water cooling condenser 5 from the inlet fitting 19 through a water pipe (not shown), and is heated there by exchanging heat with the gas refrigerant, and then the water pipe and the water control valve 21. Is discharged from the outlet fitting 20 through the drainage pipe.

The drain condensed on the evaporator 10 is dropped on the drain pan 22 and is passed through the drain hose 23 to the drain port.
Emitted from 24.

Reference numeral 41 denotes an inner and outer partition wall, which is fastened to the end wall 2 of the container 1 by a flange 44 formed on the entire circumference thereof. A condenser section 42 is formed outside the partition wall 41 in the center of the lower portion thereof, an evaporator section 15 is provided above the condenser section 42, an air passage 16 is provided on both sides of the inside of the partition wall 41, and a blowout chamber is provided below. 18 are formed respectively.
An evaporator 10, an evaporator fan 12, etc. are installed in the evaporator section 15. A compressor 3, an air-cooled condenser 4, a condenser fan 6 and the like are installed in the condenser section 42.

Reference numeral 25 is a control box, 26 is a solenoid valve for liquid injection for injecting and cooling a liquid refrigerant into the compressor 3, 27 is a 200V class power plug,
28 is a 400V class power supply plug, 29 is a power transformer, 31 is an intake air temperature sensor for detecting the temperature of the air in the refrigerator that is sucked into the evaporator 10, 30 is an insertion port of a thermometer for checking the temperature sensor 31, 33 is a blown air temperature sensor for detecting the temperature of the air blown from the evaporator 10, 32 is an insertion port of a thermometer for checking the temperature sensor 33, and 34 is an outlet for detecting the refrigerant outlet temperature of the evaporator 10. A temperature sensor, 35 is an overheat prevention sensor, 36 is a discharge pipe temperature sensor for detecting the temperature of the discharge pipe of the compressor 3, 37 is an outside air temperature sensor for detecting the temperature of the outside air flowing into the air cooling condenser 4, and 38 is An inspection lid for inspecting the equipment in the evaporator section 15, 39 is a handle for attaching and detaching the inspection lid 38, and 40 is a ventilation device.

As shown in FIG. 2, the control box 25 is a cover for opening and closing the box body 50 and its front opening.
It consists of 51 and. The cover 51 has two hinges 52 on one side edge.
A butterfly bolt 54 that is hinged to the box body 50 by passing through a bracket 53 protruding on the other side edge and locked with this.
Is fastened to the box body 50 by screwing the nut into a nut 56 welded to a fastening piece 55 protruding from the box body 50.

A control device 58 such as a control, a recorder, a contactor, and a relay is fixed to a substrate 57 installed in the box body 50, and a seal material 59 made of an elastic material is attached to the entire inner surface of the cover 51 to form a box. The close contact of the opening edge of the main body 50 prevents water and dust from entering the control box 25. Reference numeral 49 is a glass window provided on the cover 51.

[0012]

In the above conventional container refrigeration unit, the cover 51 is opened and closed for the operation, inspection, maintenance, etc. of the control device 58 installed in the control box 25. If you forget to close it, water or dust may enter the control box 25
There was a risk of short circuit accident, corrosion, etc. of 58.

[0013]

SUMMARY OF THE INVENTION The present invention has been invented to solve the above-mentioned problems, and its gist is to provide a box main body in which a control device is housed and installed and its front opening. In the container refrigeration unit equipped with a control box including a cover that opens and closes, the above-mentioned cover forgetting detection means and a warning means for warning when the detection means detects that the cover is not closed are provided. It is in a container refrigeration unit.

[0014]

In the present invention, since the above-mentioned configuration is provided, when the forgetting to close detection means detects the forgetting to close the cover, the warning means gives a warning.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENT One embodiment of the present invention is shown in FIG. As shown in FIG. 1 (B), a limit switch 60 is provided on the front surface of the fastening piece 55 protruding from the box body 50. The limit switch 60 is ON when the cover 51 is open, and the cover 51 is closed. At the time of, it contacts the bracket 53 and turns off. When the limit switch 60 is turned on, the relay 61 connected in series with the limit switch 60 is excited and its contact 62 is turned on, as shown in FIG. 1 (A).
Turns on. Along with this, the warning means 63 such as a buzzer and a lamp connected in series with the contact 62 is energized, and this warning means 63
Warns you that you have forgotten to close the cover. Incidentally, 64 is an operation switch. The other structure is the same as the conventional structure shown in FIGS.

Since a warning that the cover 51 has not been closed is warned, the cover 51 can be closed immediately, and therefore,
It is possible to prevent a short circuit accident and corrosion of the control device 58 due to forgetting to close the cover 51.

In the above embodiment, the limit switch 60 detects the forgetting to close the cover 51. However, instead of the limit switch 60, a photo interrupter, a magnetic reed switch or the like may be used as the forgetting to close detector. it can.

Further, in order to distinguish between the case where the cover 51 is positively opened and the case where the cover 51 is forgotten to be closed, the warning means 63 is activated after a predetermined time, for example, 1 to 2 hours has elapsed after the operation switch 64 or the limit switch 60 is turned on. It is also possible to provide a switch for forcibly releasing the operation of the warning means 63.

[0019]

As described above, according to the present invention, since the user forgets to close the cover, the user can prevent forgetting to close the cover. Therefore, it is possible to prevent a short-circuit accident and corrosion of the control device due to water and dust that enter the control box, and improve the reliability of the container refrigeration unit.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (A) is an electric control circuit, and (B) is a partial side view of a control box.

FIG. 2 shows an example of a conventional control box,
(A) is a front view, (B) is a longitudinal sectional view taken along the line BB of (A),
(C) is a partial side view taken along the arrow C of (A).

FIG. 3 shows a schematic configuration of a conventional container refrigeration unit, (A) is a front view, (B) is a vertical sectional view taken along the line BB of (A), and (C) is (B). It is a cross-sectional view taken along the line CC in FIG.

[Explanation of symbols]

 50 Box body 51 Cover 60 Forgetting to detect closing 63 Warning means

Claims (1)

[Claims] 1. A refrigeration unit for a container, comprising a box main body in which a control device is housed and installed, and a control box consisting of a cover for opening and closing a front opening of the box refrigeration unit. A refrigerating unit for a container, which is provided with a warning means for warning when the user forgets to close the container.